Many,
my understanding is the test has to be done in a multi crew certified aircraft which the candidate is type rated on.
However the good news is there's a lot of requirements changing on a daily basis as Fort Fumble find bits and pieces of part 61 that are illogical, defy common sense, don't work or cant be made to work, or are obviously too onerous to apply.
Its a bit like the manufacturer who uses a warranty period as quality control, The regulations will mature.
They have deferred the requirement for a MCT course, hopefully there may be some changes to the aircraft type required.
We can only hope.
CAsA may also imagine that airlines will fund the ATPL, but I somehow doubt that contention.
Fifty grand to ATPL an Aussie pilot or four grand for a 457 visa, guess who wins?
When that starts happening I would expect some political pressure will be applied, I certainly hope so.